Pressure operated valve



Jan. 27, 1953 A. B. WILSON 2,626,633

PRESSURE OPERATED VALVE Filed Sept. 2, 1949 INVENTOR.

ATTORNEYS Patented Jan. 27, 1953 UNIT ED S TAT E S PAT E T QFFI CFE I I.LZERESSURE OPERATED VALVE Allen B. Wilson, Galena Earle-Tex.Application September 2, 1949;Se1ial*No. 113,823

This .invention relates to .pressure operated valves.

An object of this inventionis to .providetavalve structure which ismoved to open position by means of pressure in the valve housing and isautomatically latched in open position.

Another object of this invention is to provide a pressure valvestructure which can be remotely controlled both as to opening andclosing.

A further object of this invention is to provide a pressure valvestructure which is adapted to be interposed in a pipe line through whichinflammable liquid or gas flows, so that in the event of fire in astorage tank, the pipe line can be cut off from a remote point or may beopened to permit draining of the liquid from below the fire andsubsequently closed.

A further object of this invention is to provide a pressure valvestructure including a springpressed latch means for holding the valveplug in open position, the latch means being releasable by remotelycontrolled pressure means, or being manually releasable at the valvestructure.

With the above and other objects in view, my invention consists in thearrangement, combination and details of construction disclosed in thedrawing and specification, and then more particularly pointed out in theappended claim.

In the drawing,

Figure 1 discloses a vertical section of a pressure operated valveconstructed according to an embodiment of this invention.

Figure 2 is a fragmentary diagrammatic view showing the manner ofconnecting this valve in the discharge system.

Referring to the drawing, the numeral Ill designates generally a valvehousing provided with inlet and outlet ports I and I2 respectively. Agate valve plug I3 is slidably carried by the housing I0, engaging inguide channels l4, and a stem I5 is connected with the gate valve plugl3 and extends upwardly through a bushing I6.

The bushing l6 includes a passage H which is connected with the housingI0 on the outlet side thereof, through a connecting passage l3. Acylinder I9 is secured by fastening members 20 to the upper end of thebushing I6 and has slidably mounted therein a piston or plunger 2| whichis fixed to the stem I5. The piston or plunger 2| has fixed to the upperside thereof a notched bar 22, which is slidable in the bore 23 of ahousing 24 extending from the upper end of the cylinder l9.

A spring 25 engages about the bar 22, bearing at its lower end againstthe piston or plunger 2| and:.-at:its upper :endiagainst'thehead :26 ofthe cylinder 19 so as to constantly urge the piston 2| downwardly, andthe valve plug Iii-inwardly of .the housing, to closedposition. Thenotched bar 22 is adapted to be locked in its outer position by means ofa locking bolt 21 which is slidable in a bore 28 extending laterally ofthe head 26. A stem 29 is fixed to the bolt 21 and extends through acylinder 39 which is connected with the head 26. A piston or plunger 3|is fixed to the stem 29 within the cylinder 3!], and a spring 32 bearsagainst the piston 3| and against a cap 33 mounted on the cylinder 30and constantly urges the bolt 21 inwardly to locking position.

The housing to is interposed in a bypass pipe 34 which is connected to adischarge pipe 35 having a manually controlled valve 36 interposedtherein. A check valve 31 is interposed in pipe 34 between valve Ill andtank T, the check valve opening outwardly.

A second manual valve 38 is interposed in a pressure pipe line 39 and ispositioned remote from valve it] so that release pressure may be safelycommunicated with the release cylinder 30 for releasing the gate valve|3 to permit this valve member to move to closed position under thetension of spring 25. The upper portion of housing 24 is provided with avent opening 49, and the cap 33 is also provided with a vent opening 4|.A knob 42 is secured to the outer end of the stem 29 in order that bolt21 may be manually operated without opening valve 38.

Preferably the valve structure Iii is mounted closely adjacent a tank Tcontaining volatile liquid. The housing I6 is preferably connected tothe bypass pipe line 34 so that in the event of fire in the tank theliquid .below the fire may be drawn ofi without undue risk of injury tothe workmen. The valve is preferably in normally closed position but maybe opened from a remote position by putting back pressure in dischargeline 35 with valve it closed. The pressure in valve housing l0 will becommunicated to cylinder l9 through passages I8 and ll, thereby causingpiston or plunger 2| to move outwardly and draw gate valve plugtherewith to an open position. When piston 2| moves outwardly,spring-pressed bolt 21 will ratchet over notched bar 22 in order to holdthe valve plug 3 in a selected open position. If it is desired torelease valve plug I3 from a remote position, valve 38 may be opened,thereby communicating fiuid pressure to release cylinder 30 and causingpiston or plug 3| to move outwardly and draw therewith bolt 21. Bolt 21may 3 also be moved to an open position by manual engagement with knob42.

With a valve structure as hereinbefore described, volatile liquids intanks or supply reservoirs may be drawn off without injury to theworkmen and with the drawing off of the bulk of the liquid in the tankor reservoir the fire hazard will be very substantially reduced.

I do not mean to confine myself to the exact details of constructionherein disclosed, but claim all variations falling within the purview ofthe appended claim.

What I claim is- A fluid pressure system for a tank having a dischargeline, a control valve in the line operative to close said line, a seconddischarge line from the tank connected to the first-mentioned line onthe outlet side of said control valve and having a check valve openingoutwardly of the tank, a pressure responsive valve in said seconddischarge line having an outlet port in communication with said tankthrough said check valve, said pressure responsive valve having a plugand spring means for holding said plug in a normally closed position, acylinder means communicated with said outlet port, a plunger havingpressure responsive means thereon and disposed in said cylinder andconnected to said plug for operative movement thereof to an openposition in response to pressure in said outlet port, and releasablelatch means engageable with said plunger for holding the plug in an openposition.

ALLEN B. WILSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

